Respiration and Photosynthesis Lab Flashcards
Photsynthesis
CO2 + H2O + ENERGY —-> C6 H12 06
RESPIRATION
C6 H12 06——> CO2 + H2O + ENERGY
What occurs in Respiration
The high energy electrons that form the covalent bonds of the glucose molecule are removed and pass through a series of energy levels leading to oxygen ( the lowest level of all.
As they pass through these levels , the electrons are forced by the laws of physics to give off excess energy.
It is this energy that is stored in the chemical bonds of ATP.
The energy given off in the respiration process is stored where
In the the chemical bonds of ATP
2 ways organisms produce atp without oxygen
- fermentation
2. anaerobic respiration ( using some other molecule as the last terminal accept for the ETC) ( common in prokaryotes)
OXIDATION
A molecule has lost an electron
REDUCTION
A molecule has gained an electron
MB OXIDIZED ( methelyne Blue)
BLUE
MB REDUCED
COLORLESS
How is Methylyn Blue used to test for bacteria in a milk sample
oxidized MB is added to the milk sample and the time required for the dye to become completely reduced is observed ( become colorless)
The rate of MB reduction is roughly porpotional to
the number of bacteria present in the sample being investigated
What happens if bacteria are growing in a liquid environment
They will rapidly consume any oxygen present and the environment will become an aerobic
How do bacteria use MB
as a electron acceptor in the ETC instead of oxygen. This causes the MB to be reduced turning it from blue ( oxidized) to colorless ( oxidized)
The presence of light has what affect on bacteria reducing MB
causes reduction to take place much quicker than it would in the dark
How can RESPIRATION be defined
the oxidation of glucose using oxygen as the ultimate terminal acceptor
